Telephone call mechanism.



NO. 796 562. I PATENTEDQAUG. a, 1905.

I T. R. GAMPBELL.

TELEPHONE CALL MECHANISM.

APPLICATION PiLBD JAN- 05- 2 SHEETS-SHEET 1.

2- /2. (M M wag wiltweowo 51 9 LJ No. 796,562. PATENTED AUG. 8, 1905 T. R. CAMPBELL.

TELEPHONE CALL MECHANISM.

APPLICATION FILED JAN. 14, 1005.

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W H l -[W ANDRiW s cnmm co, momumucnnuins wlsummon. u c.

UNITED STATES PATENT OFFICE.

TELEPHONE CALL MECHANISM.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed January 14,1906. Serial No. 241,080.

The principal object is to greatly simplify signaling mechanism of the above character by making certain elements perform a plurality of functions, thereby not only reducing the number of parts, connections, and the like, but also effecting a material reduction in i the space necessary to contain the apparatus.

An embodiment of the invention which is at present considered a preferable one is illustrated in the accompanying drawings and is described in the following specification. An inspection of the claims hereto appended will clearly indicate, however, that the invention is not limited to the exact structure shown and that the same is open to various changes and modifications.

In the drawings, Figure 1 is a sectional view through a portion of a casing, showing the im roved a aratus in elevation. Fi 2 is a sectional View taken on the line 2 2 of Fig. 1.

Fig. 3 is an end elevation of the mechanism. Fig. 4 is a longitudinal sectional view taken on the line 4 4: of Fig. 3. Fig. 5 is a diagrammatic view showing the electrical connections between the mechanism and the line.

Similar reference-numerals designate corresponding parts in all the figures of the drawings.

In the embodiment illustrated an ordinary form of magneto-electric generator is shown, the same being so arranged, however, that it constitutes a combined generator and motor designed when acting inits first capacity to generate a current of electricity and in its second capacity acting as a motor to ring a bell at the station of which the mechanism forms a part.

In the structure shown the usual series of horseshoe-magnets 6 are employed, between the poles of which is located the usual armature 7, the coils 8 of which have one terminal grounded on the frame of the generator,

the other terminal being electrically connected to acontact-pin 9, projecting from one end of the generator-shaft 10. The other end of the shaft is provided with a pinion 11, with which meshes a gear-wheel 12, carried by a drivingshaft 13, journaled in the frame of the machine and having the usual exposed handlecrank 14, by means of which the driving-shaft can be manually operated. The shaft 13 is capable of longitudinal sliding movement for the purpose hereinafter explained. So far as thus described the generator is an old and well-known article and may be changed and modified as desired.

Mounted on the end of the armature-shaft 10 that is opposite the pinion 11 and rotatable therewith is a crank element in the form of a disk 15, having in its outer side a recessed seat or notch 16. The lower end of a lever 17 detachably engages in said seat and is supported between its ends on a pivot-pin 18, carried by a bracket portion 19, which is secured to the frame of the generator. The lever is capable of sliding movement on its pivot-pin 18, and'its swinging movement is limited by the end walls of a slot 20, through which the lower arm of said lever passes and in which it operates. The said lever is normally held in the seat 16, and consequently in interlocking engagement with the armature, by means of a coiled spring 21, hearing at one end against the outer end of the bracket 19 and having its other end surrounding the free end of the pivot-pin 18 and bearing against the lever. The upper arm of the lever 17 is located in the path of longitudinal movement of the shaft 18, and said arm carries an outwardly-extending finger 22, provided with a clapper 23, that operates upon a hell 2 1, suitably secured to the casing or boxing 25 of the instrument. The armature and the crankdisk 15 are yieldingly held in a predetermined position, so that the lever will interlock with the latter, by means of a coiled spring 26, one end of which is attached to a crank-arm 27, carried by the end of the armature-shaft 10, that is provided with a pinion, the other end of said spring being suitably attached to a bracket 28, secured to one of the magnets or to the frame of the apparatus.

The electrical connection between the mechanism and the ordinary telephone system is shown in Fig. 5, wherein the line-wires are respectively designated 29 and 30. The line 29 has a branch 31, that is grounded upon the frame of the machine 6 and is in electrical connection with one end of the coil 8 of the armature, while the other line-wire 30 has electrical connection through the usual hookswitch'32 with a branch 33, that is in turn connected to a spring 34:, bearing against the contact-pin 9 of the armature. The receiver is shown at 35 and has connection with one of the line-Wires, as 29, said receiver being also connected to an induction-coil 36. which induction-coil is included in the circuit of the battery 7 and transmitter 38.

It will be observed that as long as the receiver is on the hook 32 the armature will be in circuit with the line. Therefore if a pulsating or alternating current is sent over said lineas, for instance, from another magnetogeneratorit will be clear. that the armature of the mechanism illustrated will be oscillated, thereby causing the oscillation of the lever 17 and the ringing of the bell. If, however, it is desired to send out a call, it is only necessary for the operator to grasp the handlecrank 14, detach the lever 17 from the crankdisk 15 by a longitudinal movement of the shaft, after which by turning the said crankarm the armature will be rotated, a current of electricity generated therein, and said armature Will be in circuit with the line. A call will thus be sent to the connected station. As soon as the handle-crank 14 is released the spring 26 will return the armature to its initial position, thereby revolving the disk 15, so that the seat 16 will aline with the lower end of the lever 17. 'At the same time the spring 21 will return said lever to a position to interlock with the crank -disk, and the palrts will be again in position to receive a ca 1.

It will thus be seen that an extremely simple structure is provided which constitutes a combined magneto-electric generator and motor, a single field and a single armature being employed in the present embodiment both for generating a current of electricity and for efl'ecting the actuation of the signal at the station.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In apparatus of the class described, the

' combination with a magneto-generator including a field-magnet and an armature, of a signal including an oscillatory clapper, said armature and clapper having separate axes of movement, and means detachably connecting the armature and clapper for effecting the movement of the latter from the former upon the oscillation of said armature, and being detachable to permit the rotation of the armature without moving the clapper.

2. In apparatus of the class described, the

combination with a magneto-generator including a field-magnet and an armature having a shaft, of a signal including a movable clapper having its axis of movement disposed at one side of the armature-shaft, and relatively movable elements respectively connected to the shaft and clapper and having a movable and detachable connection with each other eccentric'ally of the axes of movement of said shaft and clapper for effecting the movement of the clapper from the shaft upon the oscillation of the armature, said connection being detachable to permit the rotation of the shaft and armature without operating the clapper.

3. In apparatus of the class described, the combination with a magneto-generatorincluding a field-magnet and an armature, of a signal including an oscillatory clapper, said armature and clapper having separate spaced axes of movement, and relatively movable devices respectively connected to the clapper and to the armature and movable therewith, said devices having a movable engagement with each other between said axes of movement and one of the same being movable to disengage the other and permit the manual operation of the armature without moving the clapper.

4. In apparatus of the class described, the combination with a magneto-generator, including a field-magnet and an armature, of a signal including an oscillatory clapper, said armature and clapper having separate spaced axes of movement, and relatively movable devices respectively connected to the clapper and to the armature, one of said devices having a seat disposed eccentrically to its axis of movement, the other having a projection located at one-side of its axis of movement and movably engaging in the seat.

5. In apparatus of the class described, the combination with a combined magneto-generator and motor including a field-magnet and an armature having a shaft, acrank-disk fixed to the shaft, a lever fulcrumed at one side of the shaft and having a movable and detachable engagement with the crank-disk eccentrically to the axis of movement ofthe shaft, and a signal comprisinga bell and a clapper, said clapper being connected to the lever and operated thereby upon the oscillation of the shaft, and said lever being movable to disconnect the clapper from the shaft and permit the rotation of said shaft without operating the clapper.

6. In apparatus of the class described, the combination with a magneto-electric generator including a field-magnet and a currentgenerating armature, of a signal comprising a bell and a clapper coacting therewith, and a lever pivotally supported between its ends independently of the armature, one of said ends being eccentrically connected to the armature,

the other end carrying the clapper.

7. In apparatus of the class described, the combination with a magneto-electric generator including a field-magnet and a currentgenerating armature, of a bell mounted adjacent to the generator, a lever pivotally supported between its ends and havingits axis of movement separate from that of the armature, a movable interlocking connection between one end of the lever and the armature said connection being eccentric to the axis of movement of the armature, and a clapper carried by the lever and coacting with the bell.

8. In apparatus of the character described the combination with a bell and clapper coacting therewith, of a field-magnet, an armature coacting with the field-magnet and having a shaft, a lever pivot-ed between its ends at one side of and in spaced relation to the shaft, said lever having a connection on one side of its pivot-axis with the clapper, and a movable connection between the armature and the lever on the other side of said pivot-axis.

9. In apparatus of the class described, the

combination with a bell and clapper coacting therewith, of a field-magnet, an armature coacting with the field-magnet, a pivotally-supported lever having a connection with the clapper, and a crank element carried by the armature-shaft and having an eccentric seat that receives one end of the lever.

10. In apparatus of the class described, the combination with a field-magnet, of an oscillatory armature coacting therewith and having a shaft, a crank-disk carried by the shaft and having a recessed eccentrically-disposed seat, a pivotally-supported lever having one end movably engaged in the seat, a bell, and a clapper coacting with the bell and carried by the lever.

11. In apparatus of the class described, the

combination with a field-magnet, of an armature coacting therewith and having a'shaft, a pivotally supported lever, an interlocking connection between the lever and armatureshaft disposed eccentrically to the axes of movement of both, and a signal including a bell and clapper, said clapper being operated by the lever.

12. In apparatus of the class described, the combination with an armature, of a clapper, a pivotal support for the clapper having its axis of movement separate from that of the armature, means for connecting the support and armature to eflect the movement of the former from the latter, and means for disengaging the connection and support to permit the independent movement of the armature.

13. In apparatus of the class described, the combination with a rotatable armature, of an oscillatory clapper, separable devices respectively connected to the clapper and armature and having a detachable interlocking engagement that is disposed eccentrically to the axes of movement of the clapper and armature,

and means for effecting the disengagement of said devices.

14. In apparatus of the class described, the combination with a rotatable armature, of an oscillatory clapper, a lever carrying the clapper, a crank element carried by the armature and having a detachable connection with the lever eccentrically of the axes of movement of said lever and armature, and means for rotating the armature and effecting the disengagement of the lever and crank element.

15. In apparatus of the class described, thev combination with a combined motor and generator comprising a field-magnet and an armature, of a bell, a clapper coacting with the bell, a lever detachably connecting the clapper and armature and pivotally supported at one side of the axis of rotation of the armature, and means for rotating the armature, said means including a shaft that is longitudinally slidable and is movable into engagement with the lever to disconnect the clapper and armature.

16. In apparatus of the class described, the combination with a combined motor and magneto-electric generator including a field-magnet and an armature having a shaft, of a crank element carried by the armature, a lever pivotally supported at one side of the shaft and having a detachable engagement with the crank element and therethrough having a sliding movement on its pivot-axis, a bell, a clapper carried by the lever and coacting with the bell, a spring bearing against the lever for holding the same in engagement with the crank element, and a driving-shaft having a geared connection with the armature, said shaft also having a longitudinal sliding movement and being arranged to engage the lever upon such movement to disengage the same from the crank element.

17 In apparatus of the class described, the

combination with a combined motor and magneto-electric generator including a field-magnet and an armature having ashaft, of a crankdisk carried by the shaft and having a socket, a lever pivotally supported at one side of the shaft and between its ends, one end of said lever being movable into and out of the socket of the crank-disk, a bell, a clapper carried by the lever and cooperating with the bell, a spring engaging the leverfor holding the same in the socket, and a driving-shaft having a gear connection with the armature-shaft, one end of said driving-shaft being movable into engagement with one side of the lever for moving the same against the tension of the spring and out of engagement with the crank-disk.

18. In apparatus of the character described, the combination with a field-magnet, of a rotatable armature coacting therewith, a pinion on one end of the armature, a crank element on the other end of the armature, a lever pivoted at one side of the axis of rotation of the armature and having a detachable engagement veese.

In testimony whereof I aifix my signature in presence of two subscriblng witnesses.

TRACY R. CAMPBELL.

Witnesses:

G. C. BUSH, DUNCAN F. MCPHERSON. 

